1.--100% die casting molding 2.--Tol.+/-0.005mm without secondary process 3.--No draft angel allowed 4.--good surface finishing 5.--Nickel plating attach the picture for reference,pls check it. Yeewah is a professional Zinc alloy and Aluminum alloy die casting manufacturer. We found in Hong Kong in 1994 and using Japanese management. We are ISO 9001 and ISO 14001 certified. And we are Sony GP. To learn us more, pls visit ourwebsite. I will serve you sincerely.